Minimal One Pager for ‘Pattern’ – a beautifully simple drawing app for iPad and iPad Pro. The website has an additional page for support but we’ll acknowledge it a support centre, which is accepted in the One Page rules.
This website has unfortunately been redesigned or gone offline, so I have removed the direct link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this Archive.org link. FYI: the site was first featured on 29 August 2016.